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Performance of numerical integrators on tangential motion of DEM within implicit flow solvers

Record type: Article

This study examines the behaviour of continuous time integration schemes over discontinuities in the tangential forces typical in an oblique impact within a Discrete Element Simulation (DEM). High order schemes are associated low error and efficient computation, however, for DEM this is not always the case. The simulations consist of a particle impacting tangentially with a plane and sliding along it, this makes the numerical integration independent of errors from the normal force integration. Three possible force regimes that occur in the tangential motion of an oblique impact are explored; frictional, elastic and elastic-to-frictional. Tests are conducted to explore the effects of the location of the discontinuity within the time step and to examine scheme order through varying time step resolution. For certain scenarios the tangential motion contains elastic and then frictional forces, this presents a second discontinuity between these force regimes. The effects of this second discontinuity are also presented. It was found that all schemes were limited to 1st order by at least one of the conditions tested. The Symplectic Euler is recommended as it is found to be of generally higher accuracy than other 1st order schemes in these tests, as was found in a similar study regarding normal impacts

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Citation

Jasion, G., Shrimpton, J., Danby, M. and Takeda, K. (2011) Performance of numerical integrators on tangential motion of DEM within implicit flow solvers Computers and Chemical Engineering (doi:10.1016/j.compchemeng.2011.02.017).

More information

Published date: March 2011
Keywords: particle, discrete element method, tangential force, numerical integration, implicit flow solvers
Organisations: Thermofluids and Superconductivity, Optoelectronics Research Centre

Identifiers

Local EPrints ID: 184937
URI: http://eprints.soton.ac.uk/id/eprint/184937
ISSN: 0098-1354
PURE UUID: 0b724309-a6e5-4e52-ad15-70b7edac7bbd
ORCID for G. Jasion: ORCID iD orcid.org/0000-0001-5030-6479

Catalogue record

Date deposited: 09 May 2011 12:48
Last modified: 18 Jul 2017 11:50

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